/**
* <p>Reads format information from one of its two locations within the QR Code.</p>
*
* @return {@link FormatInformation} encapsulating the QR Code's format info
* @throws ReaderException if both format information locations cannot be parsed as
* the valid encoding of format information
*/
public FormatInformation readFormatInformation()
{
if (parsedFormatInfo != null)
{
return(parsedFormatInfo);
}
// Read top-left format info bits
int formatInfoBits = 0;
for (int j = 0; j < 6; j++)
{
formatInfoBits = copyBit(8, j, formatInfoBits);
}
// .. and skip a bit in the timing pattern ...
formatInfoBits = copyBit(8, 7, formatInfoBits);
formatInfoBits = copyBit(8, 8, formatInfoBits);
formatInfoBits = copyBit(7, 8, formatInfoBits);
// .. and skip a bit in the timing pattern ...
for (int i = 5; i >= 0; i--)
{
formatInfoBits = copyBit(i, 8, formatInfoBits);
}
parsedFormatInfo = FormatInformation.decodeFormatInformation(formatInfoBits);
if (parsedFormatInfo != null)
{
return(parsedFormatInfo);
}
// Hmm, failed. Try the top-right/bottom-left pattern
int dimension = bitMatrix.getDimension();
formatInfoBits = 0;
int iMin = dimension - 8;
for (int i = dimension - 1; i >= iMin; i--)
{
formatInfoBits = copyBit(i, 8, formatInfoBits);
}
for (int j = dimension - 7; j < dimension; j++)
{
formatInfoBits = copyBit(8, j, formatInfoBits);
}
parsedFormatInfo = FormatInformation.decodeFormatInformation(formatInfoBits);
if (parsedFormatInfo != null)
{
return(parsedFormatInfo);
}
throw new ReaderException();
}
/// <summary>
/// <p>Reads format information from one of its two locations within the QR Code.</p>
/// </summary>
/// <returns> <seealso cref="FormatInformation"/> encapsulating the QR Code's format info </returns>
/// <exception cref="FormatException"> if both format information locations cannot be parsed as
/// the valid encoding of format information </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: FormatInformation readFormatInformation() throws com.google.zxing.FormatException
internal FormatInformation readFormatInformation()
{
if (parsedFormatInfo != null)
{
return(parsedFormatInfo);
}
// Read top-left format info bits
int formatInfoBits1 = 0;
for (int i = 0; i < 6; i++)
{
formatInfoBits1 = copyBit(i, 8, formatInfoBits1);
}
// .. and skip a bit in the timing pattern ...
formatInfoBits1 = copyBit(7, 8, formatInfoBits1);
formatInfoBits1 = copyBit(8, 8, formatInfoBits1);
formatInfoBits1 = copyBit(8, 7, formatInfoBits1);
// .. and skip a bit in the timing pattern ...
for (int j = 5; j >= 0; j--)
{
formatInfoBits1 = copyBit(8, j, formatInfoBits1);
}
// Read the top-right/bottom-left pattern too
int dimension = bitMatrix.Height;
int formatInfoBits2 = 0;
int jMin = dimension - 7;
for (int j = dimension - 1; j >= jMin; j--)
{
formatInfoBits2 = copyBit(8, j, formatInfoBits2);
}
for (int i = dimension - 8; i < dimension; i++)
{
formatInfoBits2 = copyBit(i, 8, formatInfoBits2);
}
parsedFormatInfo = FormatInformation.decodeFormatInformation(formatInfoBits1, formatInfoBits2);
if (parsedFormatInfo != null)
{
return(parsedFormatInfo);
}
throw FormatException.FormatInstance;
}